Media Dissect Sen. Ted Cruz's Presidential Prospects

Sen. Ted Cruz, R-Texas, arrives Sunday for a walk-through for today's speech at Liberty University in Lynchburg, Va., in which he is expected to formally launch his campaign for president.

As NPR's Domenico Montanaro reported: "Since bursting onto the scene in 2012 after his GOP primary upset victory against a former Texas lieutenant governor, Cruz has struck out not just against President Obama and Democrats, but also Republican leaders."